But how does one know what tire model to select for their classic Type 356 coupe? Approved Porsche tires wear an “N” rating on the sidewall, which denotes that the automaker has vetted the tire, and determined that it preserves the car’s ideal handling characteristics. “N1″ means that the tire model in question is the first generation of said model to be approved. As an approved Porsche tire model enters subsequent generations, the numeral following the “N” increases.

For more on the Porsche tire-vetting process, see Chief Driving Instructor Gordon Robertson explain the marque’s intense standards above.

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— Aaron Birch

Aaron Birch is an automotive enthusiast and writer/filmmaker from Detroit, MI. As a rule, he only buys cars older than himself.